Allways remove infs/nans

When exporting a project lmms performs extra tests for bad data.
The tests are for infs and nans. Switching these tests on for all
occasions as the extra performance hit would be in the order of
only ~3% and the problems, when it hits the end user, are hard to
debug and/or work around.

src/core/EffectChain.cpp

@@ -202,22 +202,16 @@ bool EffectChain::processAudioBuffer( sampleFrame * _buf, const fpp_t _frames, b
 	{
 		return false;
 	}
-	const bool exporting = Engine::getSong()->isExporting();
-	if( exporting ) // strip infs/nans if exporting
-	{
-		MixHelpers::sanitize( _buf, _frames );
-	}
+
+	MixHelpers::sanitize( _buf, _frames );
 
 	bool moreEffects = false;
 	for( EffectList::Iterator it = m_effects.begin(); it != m_effects.end(); ++it )
 	{
 		if( hasInputNoise || ( *it )->isRunning() )
 		{
 			moreEffects |= ( *it )->processAudioBuffer( _buf, _frames );
-			if( exporting ) // strip infs/nans if exporting
-			{
-				MixHelpers::sanitize( _buf, _frames );
-			}
+			MixHelpers::sanitize( _buf, _frames );
 		}
 	}